There are no hard and fast rules for brewing tea because there are so many taste preferences and drinking habits. Also, each tea has its own characteristics. The bottom line is, make it the way you like it. In general, however, if you keep in mind the following suggestions, you'll be making tea like a master in no time.
1. Use the same amount of leaf. About 1 level teaspoon for small grades (you may want to get a caddy spoon) for an 8 oz. cup.
2. Use the appropriate water temperature for the tea you are using. For Dark Oolongs, Blacks, Compressed, Flavored Blacks, and Tisanes use fresh cold water brought to a rolling boil. For Greens, Whites, Yellows, Green Oolongs and Flavored Greens bring the kettle to about 185° F. If you're sharp, you can hear the water get quiet before it boils. More delicate teas will perform their best with slightly cooler water.
3. Steep for the appropriate brew time for the tea you are using. Remember, some teas can be brewed several times and brew time changes for each brewing. For the first brew: 2-3 min. for Greens, Whites, Yellows and Compressed; 30-90 sec. for good Oolongs though some like 3-5 minutes; 3-4 min. for Blacks and Flavors; 5-8 min. for Tisanes.
4. Remove the leaves from the tea liquor when finished brewing. For stronger tea use more leaf.
5. For iced tea, use double the amount of leaf but use the same brew time. Pouring it warm over ice dilutes it perfectly.